SurrogateSelector SurrogateSelector SurrogateSelector SurrogateSelector Class

Definición

Ayuda a los formateadores en la selección de los suplentes de serialización en los que se puede delegar el proceso de serialización o de deserialización.Assists formatters in selection of the serialization surrogate to delegate the serialization or deserialization process to.

public ref class SurrogateSelector : System::Runtime::Serialization::ISurrogateSelector
[System.Runtime.InteropServices.ComVisible(true)]
public class SurrogateSelector : System.Runtime.Serialization.ISurrogateSelector
type SurrogateSelector = class
    interface ISurrogateSelector
Public Class SurrogateSelector
Implements ISurrogateSelector
Herencia
SurrogateSelectorSurrogateSelectorSurrogateSelectorSurrogateSelector
Derivado
Atributos
Implementaciones

Ejemplos

En el ejemplo de código siguiente se muestra cómo crear una clase suplente de serialización que sabe cómo serializar o deserializar correctamente una clase que no es serializable.The following code example shows how to make a serialization surrogate class that knows how to properly serialize or deserialize a class that is not itself serializable. Además, en este ejemplo también se muestra cómo recuperarse de SerializationExceptionun.In addition, this example also shows how to recover from a SerializationException.

using System;
using System.IO;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters;
using System.Runtime.Serialization.Formatters.Binary;


// This class is not serializable.
class Employee 
    {
    public String name, address;

    public Employee(String name, String address) 
    {
        this.name = name;
        this.address = address;
    }
}

// This class can manually serialize an Employee object.
sealed class EmployeeSerializationSurrogate : ISerializationSurrogate 
{

    // Serialize the Employee object to save the object's name and address fields.
    public void GetObjectData(Object obj, 
        SerializationInfo info, StreamingContext context) 
    {

        var emp = (Employee) obj;
        info.AddValue("name", emp.name);
        info.AddValue("address", emp.address);
    }

    // Deserialize the Employee object to set the object's name and address fields.
    public Object SetObjectData(Object obj,
        SerializationInfo info, StreamingContext context,
        ISurrogateSelector selector) 
    {

        var emp = (Employee) obj;
        emp.name = info.GetString("name");
        emp.address = info.GetString("address");
        return emp;
    }
}

public sealed class App 
{
    static void Main() 
    {
        // This sample uses the BinaryFormatter.
        IFormatter formatter = new BinaryFormatter();

        // Create a MemoryStream that the object will be serialized into and deserialized from.
        using (Stream stream = new MemoryStream()) 
        {
            // Create a SurrogateSelector.
            var ss = new SurrogateSelector();

            // Tell the SurrogateSelector that Employee objects are serialized and deserialized 
            // using the EmployeeSerializationSurrogate object.
            ss.AddSurrogate(typeof(Employee),
            new StreamingContext(StreamingContextStates.All),
            new EmployeeSerializationSurrogate());

            // Associate the SurrogateSelector with the BinaryFormatter.
            formatter.SurrogateSelector = ss;

            try 
            {
                // Serialize an Employee object into the memory stream.
                formatter.Serialize(stream, new Employee("Jeff", "1 Microsoft Way"));
            }
            catch (SerializationException e) 
            {
                Console.WriteLine("Serialization failed: {0}", e.Message);
                throw;
            }

            // Rewind the MemoryStream.
            stream.Position = 0;

            try 
            {
                // Deserialize the Employee object from the memory stream.
                var emp = (Employee) formatter.Deserialize(stream);

                // Verify that it all worked.
                Console.WriteLine("Name = {0}, Address = {1}", emp.name, emp.address);
            }
            catch (SerializationException e) 
            {
                Console.WriteLine("Deserialization failed: {0}", e.Message);
                throw;
            }
        }
    }
}

// This code produces the following output.
//
// Name = Jeff, Address = 1 Microsoft Way

Comentarios

Un suplente de serialización proporciona a los usuarios un objeto que puede controlar los requisitos de serialización de un objeto diferente y puede transformar los datos serializados si es necesario.A serialization surrogate gives the users an object that can handle the serialization requirements of a different object and can transform the serialized data if necessary.

Constructores

SurrogateSelector() SurrogateSelector() SurrogateSelector() SurrogateSelector()

Inicializa una nueva instancia de la clase SurrogateSelector.Initializes a new instance of the SurrogateSelector class.

Métodos

AddSurrogate(Type, StreamingContext, ISerializationSurrogate) AddSurrogate(Type, StreamingContext, ISerializationSurrogate) AddSurrogate(Type, StreamingContext, ISerializationSurrogate) AddSurrogate(Type, StreamingContext, ISerializationSurrogate)

Agrega un suplente a la lista de suplentes comprobados.Adds a surrogate to the list of checked surrogates.

ChainSelector(ISurrogateSelector) ChainSelector(ISurrogateSelector) ChainSelector(ISurrogateSelector) ChainSelector(ISurrogateSelector)

Agrega a la lista de suplentes el objeto ISurrogateSelector especificado que puede controlar un tipo de objeto concreto.Adds the specified ISurrogateSelector that can handle a particular object type to the list of surrogates.

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Determina si el objeto especificado es igual al objeto actual.Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Sirve como la función hash predeterminada.Serves as the default hash function.

(Inherited from Object)
GetNextSelector() GetNextSelector() GetNextSelector() GetNextSelector()

Devuelve el siguiente selector de la cadena de selectores.Returns the next selector on the chain of selectors.

GetSurrogate(Type, StreamingContext, ISurrogateSelector) GetSurrogate(Type, StreamingContext, ISurrogateSelector) GetSurrogate(Type, StreamingContext, ISurrogateSelector) GetSurrogate(Type, StreamingContext, ISurrogateSelector)

Devuelve el suplente de un tipo concreto.Returns the surrogate for a particular type.

GetType() GetType() GetType() GetType()

Obtiene el Type de la instancia actual.Gets the Type of the current instance.

(Inherited from Object)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

Crea una copia superficial del objeto Object actual.Creates a shallow copy of the current Object.

(Inherited from Object)
RemoveSurrogate(Type, StreamingContext) RemoveSurrogate(Type, StreamingContext) RemoveSurrogate(Type, StreamingContext) RemoveSurrogate(Type, StreamingContext)

Quita el suplente asociado a un tipo determinado.Removes the surrogate associated with a given type.

ToString() ToString() ToString() ToString()

Devuelve una cadena que representa el objeto actual.Returns a string that represents the current object.

(Inherited from Object)

Se aplica a